The score is different in the Bond films, it wasn't reused that much. Not to mention it wasn't even the same guy, Monty Norman did Dr. No and John Barry did From Russia With Love for example. That said, Barry did do a lot of them (the majority IIRC) but they're all different.
Are you sure? This site doesn't take 3D into account for the UK, and it has Titanic at 17.18m and Avatar at 16.5m:http://lumiere.obs.coe.int/web/film_info/?id=8001http://lumiere.obs.coe.int/web/film_info/?id=32191
I'm pretty sure there were holidays in Germany, not to mention films hold better there anyway. And there could've been a spillover effect that didn't happen DOM because it wasn't as large.